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Electroejaculation
Electroejaculation is a procedure used to semen collection, obtain semen samples from sexually mature male mammals. The procedure is used for breeding programs and research purposes in various species, as well as in the treatment of Anorgasmia, ejaculatory dysfunction in human males. This procedure is used frequently with large mammals, particularly Frozen bovine semen#How semen is collected, bulls and some domestic animals, as well as humans who have certain types of anejaculation. Electroejaculation has also been used for the cryoconservation of animal genetic resources, where semen is stored in low temperatures with the intent of conserving genetic material and future revival. In the practice of veterinary medicine and animal science, it is common to collect semen from domestic ruminants using electro-ejaculation without sedation or anesthesia. Only in goats is mild sedation sometimes used. Because of the significant skeletal muscle contractions it causes, electroejaculation is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semen Collection
Semen collection refers to the process of obtaining semen from human males or other animals with the use of various methods, for the purposes of artificial insemination, or medical study (usually in fertility clinics). Semen can be collected via masturbation (e. g., from stallions and canids), prostate massage, artificial vagina, penile vibratory stimulation (vibroejaculation) and electroejaculation. Semen can be collected from endangered species for cryopreservation of genetic resources. By species Humans Methods of semen collection from humans include: * Masturbation, directing the sample into a clean cup. This is the most common way to collect a semen sample. * Sexual intercourse using a special type of condom known as a collection condom. Collection condoms are made from silicone or polyurethane, as latex is somewhat harmful to sperm. Many men prefer collection condoms to masturbation, and some religions prohibit masturbation entirely. Adherents of religions that prohibit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semen Collection
Semen collection refers to the process of obtaining semen from human males or other animals with the use of various methods, for the purposes of artificial insemination, or medical study (usually in fertility clinics). Semen can be collected via masturbation (e. g., from stallions and canids), prostate massage, artificial vagina, penile vibratory stimulation (vibroejaculation) and electroejaculation. Semen can be collected from endangered species for cryopreservation of genetic resources. By species Humans Methods of semen collection from humans include: * Masturbation, directing the sample into a clean cup. This is the most common way to collect a semen sample. * Sexual intercourse using a special type of condom known as a collection condom. Collection condoms are made from silicone or polyurethane, as latex is somewhat harmful to sperm. Many men prefer collection condoms to masturbation, and some religions prohibit masturbation entirely. Adherents of religions that prohibit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Posthumous Sperm Retrieval
Posthumous sperm retrieval (PSR) is a procedure in which spermatozoa are collected from the testes of a human corpse after brain death. There has been significant debate over the ethics and legality of the procedure, and on the legal rights of the child and surviving parent if the gametes are used for impregnation.Orr, RD; Siegler, M (2002) Is posthumous semen retrieval ethically permissible? '' J Med Ethics 2002;28:299–302'' Cases of post-mortem conception have occurred ever since human artificial insemination techniques were devised, via sperm donation to a sperm bank after the death of the donor. While religious objections have been made even under these circumstances, far more censure has arisen regarding invasive retrieval from fresh cadavers or patients either on life support or in a persistent vegetative state, particularly when the procedure is carried out without explicit consent from the donor. Cases The first successful retrieval of sperm from a cadaver was reporte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anejaculation
Anejaculation is the pathological inability to ejaculate despite an erection in males, with (''orgasmic'') or without (''anorgasmic'') orgasm. Causes It can depend on one or more of several causes, including: * Sexual inhibition * Pharmacological inhibition. They include mostly antidepressant and antipsychotic medication, and the patients experiencing that tend to quit them an * Autonomic nervous system * |
Cryoconservation Of Animal Genetic Resources
Cryoconservation of animal genetic resources is a strategy wherein samples of animal genetic materials are preserved cryogenically."Cryoconservation of Animal Genetic Resources", Rep. Rome: Food and Agriculture Organization of the United Nations, 2012. FAO Animal Production and Health Guidelines No. 12. Print. Animal genetic resources, as defined by the Food and Agriculture Organization of the United Nations, are "those animal species that are used, or may be used, for the production of food and agriculture, and the populations within each of them. These populations within each species can be classified as wild and feral populations, landraces and primary populations, standardised breeds, selected lines, varieties, strains and any conserved genetic material; all of which are currently categorized as Breeds." Genetic materials that are typically cryogenically preserved include sperm, oocytes, embryos and somatic cells.Mazur, P., S.p Leibo, and G. E. Seidel.Cryopreservation of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JoGayle Howard
JoGayle Dillon Howard (1951–2011) was an American zoologist and theriogenologist specializing in the captive breeding of endangered species such as pandas, clouded leopards, and black-footed ferrets. Biography Howard was born on May 20, 1951, in Dallas, Texas. She graduated with a doctorate in veterinary medicine from Texas A&M in 1980. She earned a PhD in reproductive physiology from University of Maryland in 1989. Dr. Howard received her D.V.M. from Texas A&M University in 1980, and Ph.D. from the University of Maryland in 1989. Originally a veterinarian, Howard later became an expert in animal breeding, receiving the nickname "Sperm Queen".” She used common human infertility treatments, like artificial insemination and In vitro fertilisation, and was a pioneer in electroejaculation techniques. In 1980, she began working at the Smithsonian Conservation Biology Institute in Washington, D.C. She oversaw the black-footed ferret breeding program at The National Zoo. With h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryoconservation Of Animal Genetic Resources
Cryoconservation of animal genetic resources is a strategy wherein samples of animal genetic materials are preserved cryogenically."Cryoconservation of Animal Genetic Resources", Rep. Rome: Food and Agriculture Organization of the United Nations, 2012. FAO Animal Production and Health Guidelines No. 12. Print. Animal genetic resources, as defined by the Food and Agriculture Organization of the United Nations, are "those animal species that are used, or may be used, for the production of food and agriculture, and the populations within each of them. These populations within each species can be classified as wild and feral populations, landraces and primary populations, standardised breeds, selected lines, varieties, strains and any conserved genetic material; all of which are currently categorized as Breeds." Genetic materials that are typically cryogenically preserved include sperm, oocytes, embryos and somatic cells.Mazur, P., S.p Leibo, and G. E. Seidel.Cryopreservation of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ejaculation
Ejaculation is the discharge of semen (the ''ejaculate''; normally containing sperm) from the male reproductory tract as a result of an orgasm. It is the final stage and natural objective of male sexual stimulation, and an essential component of natural conception. In rare cases, ejaculation occurs because of prostatic disease. Ejaculation may also occur spontaneously during sleep (a nocturnal emission or "wet dream"). ''Anejaculation'' is the condition of being unable to ejaculate. Ejaculation is usually very pleasurable for men; '' dysejaculation'' is an ejaculation that is painful or uncomfortable. Retrograde ejaculation is the condition where semen travels backwards into the bladder rather than out the urethra. Phases Stimulation A usual precursor to ejaculation is the sexual arousal of the male, leading to the erection of the penis, though not every arousal nor erection leads to ejaculation. Penile sexual stimulation during masturbation or vaginal, anal, oral, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Breeding
Animal breeding is a branch of animal science that addresses the evaluation (using best linear unbiased prediction and other methods) of the genetic value (estimated breeding value, EBV) of livestock. Selecting for breeding animals with superior EBV in growth rate, egg, meat, milk, or wool production, or with other desirable traits has revolutionized livestock production throughout the entire world. The scientific theory of animal breeding incorporates population genetics, quantitative genetics, statistics, and recently molecular genetics and is based on the pioneering work of Sewall Wright, Jay Lush, and Charles Roy Henderson, Charles Henderson. Breeding stock Breeding stock is a group of animals used for the purpose of planned breeding. When individuals are looking to breed animals, they look for certain valuable traits in purebred animals, or may intend to use some type of crossbreeding to produce a new type of stock with different, and presumably super abilities in a given area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproduction In Mammals
Reproduction (or procreation or breeding) is the biological process by which new individual organisms – "offspring" – are produced from their "parent" or parents. Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction. There are two forms of reproduction: asexual and sexual. In asexual reproduction, an organism can reproduce without the involvement of another organism. Asexual reproduction is not limited to single-celled organisms. The cloning of an organism is a form of asexual reproduction. By asexual reproduction, an organism creates a genetically similar or identical copy of itself. The evolution of sexual reproduction is a major puzzle for biologists. The two-fold cost of sexual reproduction is that only 50% of organisms reproduce and organisms only pass on 50% of their genes.John Maynard Smith ''The Evolution of Sex'' 1978. Sexual reproduction typically requires the sexual interaction of two speciali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andrology
Andrology (from grc, ἀνήρ, ''anēr'', genitive , ''andros'', "man"; and , ''-logia'') is a name for the medical specialty that deals with male health, particularly relating to the problems of the male reproductive system and urological problems that are unique to men. It is the counterpart to gynaecology, which deals with medical issues which are specific to female health, especially reproductive and urologic health. Process Andrology covers anomalies in the connective tissues pertaining to the genitalia, as well as changes in the volume of cells, such as in genital hypertrophy or macrogenitosomia. From reproductive and urologic viewpoints, male-specific medical and surgical procedures include vasectomy, vasovasostomy (one of the vasectomy reversal procedures), orchidopexy and circumcision as well as intervention to deal with male genitourinary disorders such as the following: History Unlike gynaecology, which has a plethora of medical board certification programs worldw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vibroejaculation
Vibroejaculation (or penile vibratory stimulation) is a means of inducing ejaculation through vibration. It is used for semen collection, and in humans, the management of anejaculation. One method of penile vibratory stimulation is the use of specialised devices that are placed around the glans penis to stimulate it by vibration. Alternatively, a powerful wand vibrator of the type used as sex toy A sex toy is an object or device that is primarily used to facilitate human sexual pleasure, such as a dildo, artificial vagina or vibrator. Many popular sex toys are designed to resemble human genitals, and may be vibrating or non-vibrating ...s can be used. See also * Electroejaculation References Ejaculation inducing devices {{med-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
